Airpush account is suspended suddenly without any notice

I feel so depression for airpush. On this tuesday, My airpush was suspended suddenly without any notice, and my account have sevral thousand dollars. I sent sevral email to them thoes days, but didn’t recieve any reply. Is it they always try to suspend your account when your income is high. Without any email or any notice, which makes you feel so despression and cause you loss lots of money.
My account is suspending without any assistance. Is it anyone can give me a hand?